detail::CycleCounterX86 Struct Reference

Hardware cycle counter for x86/x86_64. More...

#include <cycle_counter_x86.h>

Public Member Functions
FORCE_INLINE void	start () noexcept
	Record the starting cycle count (serialized).
FORCE_INLINE void	stop () noexcept
	Record the ending cycle count and accumulate.
void	reset () noexcept
	Reset accumulated cycles and run count to zero.
double	avg_cycles () const
	Return the average cycles per start/stop pair.

Public Attributes
unsigned long long	start_cycles
unsigned long long	total_cycles = 0
unsigned long long	runs = 0

Detailed Description

Hardware cycle counter for x86/x86_64.

Uses __rdtsc() for timestamp reads, with _mm_lfence() to serialize instruction execution and prevent out-of-order measurement artifacts.

Member Function Documentation

avg_cycles()

double detail::CycleCounterX86::avg_cycles ( ) const

inline

Return the average cycles per start/stop pair.

reset()

void detail::CycleCounterX86::reset ( )

inlinenoexcept

Reset accumulated cycles and run count to zero.

start()

FORCE_INLINE void detail::CycleCounterX86::start ( )

inlinenoexcept

Record the starting cycle count (serialized).

stop()

FORCE_INLINE void detail::CycleCounterX86::stop ( )

inlinenoexcept

Record the ending cycle count and accumulate.

Member Data Documentation

runs

unsigned long long detail::CycleCounterX86::runs = 0

start_cycles

unsigned long long detail::CycleCounterX86::start_cycles

total_cycles

unsigned long long detail::CycleCounterX86::total_cycles = 0

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The documentation for this struct was generated from the following file:

• core/include/utilities/cycle_counter/cycle_counter_x86.h